i have a 92 gt. it also has underdrive pullys. it ran fine win i first got it and i decided to remove the smog pump. i removed it and cut the lines off the back of the heads and folded and welded them. upon start up it was running rough and rich, it would burn my eyes. i found the center of the distributor cap stuck on the rotor button. replaced the cap and button and still ran rough. replaced the tps and iac and now it would idle at all but i can keep it going if i give it gas, but once i let off it dies. no cel untill it dyes. i just pluged the vaccum lines for the smog pump. i sprayed carb cleaner thinking that it had a vaccum leak and found nothing. any ideas.